Sewing-machine power-transmitter.



l. FISCHER.

SEWING MACHINE'POWER TRANSMITTER.

APPLICATION man r1ov.11.1s114.Y

1,156,354. l Patented 001.. 12; 1915.

` A rroRNEi/S UNITED STATES PATENT canton.

JACOB FISCHER, OF ROSEVILLE, NEW JERSEY, ASSIGNOR OF ONE-HALF TO DANIEL BRANDENSTEIN. F NEW YORK, N. Y.

SEWING-MACHINE POWER-TRANSMITTER.

Speccation of Letters Patent. Patented ct. 12), 119151 Serial No. 871,469.

. v Application filed November l1, 1914,

secured upon a .rod 15 which extends from the hollow shaft 9 upwardly and into the hollow shaft 13. The forked portion of shaft 13 permits of a relative up and down movement of the rod 15. This rod 15, which, as stated, extends partly through both hollow shafts f) and 13 carries a clutch member 16, rigidly secured thereto by an appropriate set screw 16a said clutch member 16 being adapted to be brought -intoengagement with the clutch member 10 on shaft 9 before described.

It will b e noted from the foregoing descriptipn that the forked portion 11 of the To all whom 'it may won/fern Be it known that l, flacon Fisci-mn, a zen of the United States, and a resident Roseville, in the State of New Jersey, e invented certain new and useful lmprovements in Sewing- Machine Powernusmitters, of which the following is a specification.

The object of the present invention is the construction of a power driven sewing malhine wherein practically Iall the moving parts are inclosed, use of belting is obviated and ample protection is thereby given to the operator against accident from contact with l5 the moving parts or from the breakingof hollow shaft- 13 being 1n engagement with belting. My invention, moreover, enables the lugs 15a of the rod v15 said hollow shaft 13 will rotate with the said Arod 15 when the hollow shaft 9 is rotated from main power shaft 5 and the clutchA membersv 16 andv 10 are brought into engagement with one another. Conversely, the said hollow shaft 13 will remain inert whenever the clutch members 16 and 10 are out of engagement with one another.

For the purpose of depressing the clutch member 16 and bringing it into engagement with the. clutch` member 10, l secure upon the trough 17, or any other convenientplace of the sewing machine table 1, a pivotally mounted link 18, which ext-ends to and surrounds the rod 15 and thence continues toward the front of the machine as shown at 18a. Connected to thisl link 18 a downwardly depending `link 2() is provided, at the end of which a foot treadle 521 is connect-ed. The link 18--18n is mair" its inoperative position by means t 19 which may be secured to the tal which tends to hold said link as i link 2O and the treadle 21 in an upward tion. The link 118-18a at the pc it wh it surrounds the rod 15 comes, moreover, into contact with a collar, rigidly secure-: upon said rod'15 .so that the tensile A ower of the spring 19 also serves to main clutch member 16 out of contactarv coperating clutch member 10Q F rom the foregoing description it noted that the rotation of the hollow shaft 9 may be imparted to the hollow' shaft 13 by depressing the treadle 21, and through it the link 20 and the link 1818, whereby the link 1%?18a will press downwardly upon the clutch member 16 bringing itinto Contact with clutch member 10. When pressure the moving-parts to be driven at variable speeds, the variations of speed being attained by the employment of a pair of clutch members in conjunction with a foot treadle.

Figure 1 of the accompanying drawing shows an elevation partly in section of my improved mechanism; Fig. 2 shows a longitudinal cross-section of the driving mechanism, in conjunction with its related parts.

ln these drawings, 1 represents a power n'iachine table of ordinary construction; 2 a sewing machine head supported upon said table; 3 the hand wheel common to such heads, which is made fast upon the end of the driving shaft il of such sewing machine head; 5 represents the primaryl power shaft supported in bearings below the table 1, said shaft being provided with a gear wheel 6, rigidly secured thereon so as to rotate therewith.

7A represent-s a beveled gear secured upon th(` lead driving shaft 4 interposed to establish coi'innunication between the beveled gear on the primary power shaft 5, a beveled gear Pil, in continuous mesh with said gear (3 is secured upon a hollow shaft Sl extending toward said machine head 2, and in line with a hollow shaft 13. Said beveled gear Sis rigidly secured upon the hollow shaft 9 by a set screw 8 and said shaftv 9 carries u'pon its upper end a clutch member 10 rigidly secured 'thereto by a set screw 11. ln mesh with the machine head beveled gear 7 a beveled gear 12 is similarly secured upon the hollow shaft 13 which eX- tends in a direction downwardly n in line with the hollow shaft 9 and which is formed r at its lower end with a forked portion 1-1- D for the purpose of engaging with lugs 15 upon the treadle 2l is relieved it will be understood that all of these iarts will attain their inoperative position. lt will also be understood that a variation in the pressure upon the treadle and therethrough upon the cooperating clutch members will result in a p variation in speed, this being due to the variation of the friction al engagement of the clutch members 10 and 16.

The construction of my invention enables me to inclose all the moving parts beniath the sewing machine table in a protective tubing or casing so that there will be no liability -of injury to the operator, due to contact with such moving parts. Thus, thel main driving shaft 5 is permanently mclosed 1n a Kmetal casing 22 which has the opening` 23 for the passage of the hollow shaft 9. llmmediately from this opening the tubing 24 extends upwardly, having an offset portion 25 for the accommodation and protection of the clutch members l() and 1G. The hollow shaft 13 is similarly inclosed by the tubing 26 extending downwardly approximately as far as the link 18 with the offset portion 27 which meets the offset portions 25 and 25a on'either side. For the accommo- .dation of the link l818a and its up and down movement, it- 1s necessary merely to provide opposltely located slotsk on the two `its connected parts. This gearQS and its connected parts, all being substantially similar -to those of gear 8, will be made to engage beveled gear teeth on the opposite side of 'the gear ,wheel AG and will permit of the utilization of but a single beveled gear wheel simultaneously to actuatc the mechanism of two oppositely located sewing machines.

What-, claim and desire to secure by Letters Patent is:

1. A power transmitter for sewing machines comprising a. driving gear, supported beneath the sewing machine table; a driven gear secured upon the driving shaft of the sewing machine head; a transmitter shaftconsisting of a lower shaft section and an upper shaft section in alinement with one another and extending from the driving gear upwardly to the driven gear upon the sewing machine head; a beveled gear upon the lower end of said lower shaft section, in

engagement with said driving gear; a beveled gear upon the upper end of said upper shaft section, in engagement with the driven s. gear upon the sewing machine head; a clutch member upon each end of said shaft sections opposite the end carrying the respective beveled gears; spring actuated means for maintaining said clutch members apart and a treadle for bringing said clutch members into engagement with one another against the tension of said spring actuated means.

2. A power transmitter for sewing machines comprising a driving gear, supported beneath the sewing machine table; a driven gear secured upon the driving shaft of the sewing machine head; a transmittershaft consisting of a lower shaft section and an upper shaft section in alinement with one another and extending from the driving gear upwardly to the'driven gear upon the sewing machine head; a beveled gear upon the lower end of said lower shaft section, in engagement with said driving gear; a beveled gear upon the upper end of said upper shaft section, in engagement with the driven gear upon the sewing machine head; ay clutch member upon each end of said shaft sections opposite the end carrying the respective beveled gears; means for maintaining said clutch members apart and a treadle for bringing said clutch members into engagement with one another.

3. A power transmitter for sewing machines comprising a driving gear, supported beneath the sewing machine table; a driven gear secured" upon the driving shaft of the sewing machine head; a transmitter shaft consisting of a lower shaft section and an upper shaft section in alinement with one another and extending from the driving .gear upwardly to the driven gear upon the sewing machine head; a beveled gear upon the lower end of said lower shaft section, in engagement with said driving gear; a beveled gear upon the upper end of said upper shaft section, in engagement with the driven gear upon the sewing machine head; a clutch member upon each end of said shaft sections opposite the end carrying the respective beveled gears; spring actuated means for maintaining said clutch members apart and means for bringing said clutch members into engagement with one another.

In testimony whereof I have hereunto set my hand in the presence of tw'o subscribing witnesses.

JACOB FISCHER. Witnesses y CHARLES VISCHNITZER, DANIEL BRAiDENsTEIN. 

